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65 Million Years Millions Of Years
1,224 words... nd obscurity. Today, the name of Lamarck is associated merely with a discredited theory of heredity, the "inheritance of acquired traits. " However, Charles Darwin, Lyell, Haeckel, and other early evolutionists acknowledged him as a great zoologist and as a forerunner of evolution. Would Lamarck have agreed with Darwin? That is the question. Since Lamarck believe that creatures willed themselves to change, he would have felt that the moths felt the need to change. He may have supported natur...
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Polar Bears Body Temperature
1,467 wordsFirst of all we need to understand what ectothermic and endothermic animals are. Animals differ in their abilities to regulate body temperature (thermo regulation). We sometimes use the terms "cold-blooded" or "warm-blooded. " Most reptiles feel cold to the touch, while mammals and birds often feel warm. Somewhat more precise descriptions can be made by using the terms poikilothermic and homoiothermic. The body temperature of poikilotherm is relatively variable, while that of homeotherm's is rel...
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Polar Bear Food Chain
571 wordsSPECIES - Ursus Maritime, Polar Bear, lord of the Arctic. Lives in an area of five million square miles of snow and ice. From Siberia to Alaska and across Canada, Greenland and the Islands north of Norway, he is the master of all living things except man. It lives in the brutal cold, ice, and snow. The temperature can plunge down frequently to - 40 degrees and sometimes even lower but that does not bother the polar bear because of its color-less skin and layer of insulation fat. Its range extend...
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Effects Of Global Warming Polar Bears
1,306 wordsEffects of Global Warming On Polar Bears and Polar Seals Introduction Polar bears depend on polar seals as a source of food in the polar region. Polar bears hunt polar seals before winter comes, so they can get all the proteins and fats they need in order to survive. Global warming is increasing the melt of ice in the Arctic region. As a result, polar seals will not be able to survive and face the environmental changes including climate. Therefore, polar bears will be threatened by starvation an...
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Stop Global Warming Greenhouse Gasses
2,415 words... over yet, is nothing but a prelude to the future. According to scientists, the effect of global warming is behind the increase of killer hurricanes. The periodicity of hurricanes in the next hundred years is going to increase by 60 - 70 % according to recent studies. Its been noted the formation of hurricanes is closely related to weather conditions around the globe. In 1991 the winters were particularly cold in Alaska and Siberia, yet it was the same year when many furious hurricanes, notab...
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65 Million Years Millions Of Years
2,448 wordsNatural Selection process by which populations become adapted to the environment. The fitness of an individual is measured by how well its offspring reproduce i. e. how many offspring that survive and reproduce does an individual produce? Charles Darwin studies and close watched peppered moths (Boston Betularia) in their natural habitat. The peppered moths are light colored with darker areas of color. Like humans, however, these moths can be found in a range of pigmentation from very black to ve...
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Polar Bear Northern Hemisphere
1,018 wordsThere are eight different species of bears found throughout the world: the spectacled bear, the Asiatic black bear, the brown bear (including grizzlies), the polar bear, the sun bear, the American black bear, the sloth bear and the giant panda. Even though most people can distinguish a polar bear from a brown bear by the color of the fur, a lot of people fail to identify all the differences among those two species. Both bears can be perceived as large, clumsy and lumbering beasts with heavily bu...
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Beats Per Minute Polar Bears
1,024 wordsPolar Bears can be found in all of the northern regions of the world. This includes Russia, Norway, Greenland, the United States and Canada. They inhabit Arctic Sea ice, water, islands, and continental coastlines. Polar bears prefer sea ice habitat with leads, next to continental coastlines or islands. Air temperatures in the Arctic average - 34 C in winter and 0 C in summer. The coldest area in winter is northeastern Siberia, where the temperature has been recorded as low as - 69 C. The ocean t...
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Polar Bears Feet Tall
244 wordsPolar bears live only in the northern Arctic where they spend most of their time on ice floes. They are the largest land meat-eater in the world and the largest of the bear family. They are well suited to the cold Arctic ice and snow. The average adult male is 8. 5 feet tall. The average adult female 6. 5 is 6. 5 feet tall. The average adult male weighs 900 pounds and the average adult female weighs 500 pounds. Pregnant females den up for winter but do not hibernate. All polar bears may den temp...
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Polar Bear North Pole
875 wordsSaving Polar Bears Polar Bears Saving the White Beast The Polar Bear males can measure up to nine feet long, and can weigh 770 - 1430 lbs. The fur of the Polar Bear covers their entire body except their nose and pads of their feet. The Polar Bear (Ursus maritime) is the largest living carnivore on the planet earth. (National Parks Service). The polar bear lives in a small place on the top of the globe called the Arctic Circle. At an average the polar bears have about five million square miles of...
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Beats Per Minute Miles Per Hour
1,628 wordsThroughout all of the polar regions of the entire northern hemisphere roams the largest carnivorous quadruped alive in the world today, Ursus maritime. More commonly known as the polar, this huge mammal is ruler of its domain by being well adapted to its environment. The physical characteristics of polar bears make them a perfect fit in the arctic. They have a heavy stout body with strong muscular legs and well-adapted neck muscles. Their eyes are small and deep set to protect them against drivi...
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